DEVOPS
High-Cardinality Field Bucketing Proposal via GitLab MR
Detects Honeycomb dimensions that should be bucketed rather than dropped (latency, payload size, unbounded paths).
How it runs
The automated pipeline, trigger to output.
- TriggerWeekly schedule starts the bucketing cleanup pass
- ActionQuery Honeycomb for high-cardinality numeric and path fieldsHoneycomb
- LogicClassify each candidate by bucketing strategy
- ActionGenerate derived-column expression that buckets raw valuesHoneycomb
- OutputOpen GitLab MR proposing the derived column and raw-field deprecationGitLab
What it does
Not every high-cardinality field is junk. Some carry signal but in raw form, like exact latency in milliseconds or request paths with embedded IDs. This workflow finds those, proposes a derived-column that buckets the values into a small set of ranges, and ships the change as a GitLab MR.
When to use it
Use it when dropping or sampling a field loses information you actually want, but the raw cardinality is killing query performance and cost. Bucketing keeps the insight at a fraction of the distinct-value count.
How it works
- 1A weekly schedule starts the cleanup pass.
- 2It queries Honeycomb for numeric and path-like dimensions with high cardinality and active query usage.
- 3A logic step classifies each candidate by bucketing strategy: range buckets for numerics, ID-stripping for paths.
- 4It generates the derived-column expression that maps raw values into the bucketed dimension.
- 5It opens a GitLab MR proposing the derived column alongside a plan to deprecate the raw field, with cardinality-reduction estimates.
Set it up
What you configure once, before turning it on.
- 1Connect HoneycombDistributed traces and queries.
- 2Connect GitLabRepos, MRs, pipelines, registry.
- 3Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
- 4Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
- 5Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.
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